MenuEditor extension1.6.0: searcheable contenttypes
Add an extra check when `contentowner` of an record is not set.
Merge pull request #1165 from xiaohutai/master

Add an extra check when `contentowner` of an record is not set.
Handle multiple name keys in select contenttype
Set a better default date for 'datedepublish'. Fixes #1164.
Merge pull request #1163 from bacbos/ext-MenuEditor-1.6.0

MenuEditor extension1.6.0: searcheable contenttypes
Removing wrong 'template cache' option. Should fix #1147.